United States · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Washington are April, May and October, when daytime temperatures are agreeable and rainfall is relatively low.
Washington sees its warmest weather in July, when daytime highs average around 32°C, and its coolest in January (around 7°C).
Annual precipitation totals roughly 1062mm — July is typically the wettest month (~110mm) and February the driest (~66mm).
Rainfall is spread fairly evenly through the year, so no single season is dramatically wetter than the rest.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 60 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 7° / -1°C | 73mm | 🤔 Fair |
| February | 9° / 0°C | 66mm | 🤔 Fair |
| March | 14° / 4°C | 89mm | 🤔 Fair |
| April | 20° / 9°C | 82mm | 🌟 Great |
| May | 25° / 14°C | 100mm | 🌟 Great |
| June | 30° / 20°C | 107mm | 👍 Good |
| July | 32° / 22°C | 110mm | 🤔 Fair |
| August | 31° / 22°C | 83mm | 👍 Good |
| September | 27° / 18°C | 100mm | 👍 Good |
| October | 21° / 11°C | 93mm | 🌟 Great |
| November | 15° / 5°C | 74mm | 👍 Good |
| December | 9° / 1°C | 87mm | 🤔 Fair |
January in Washington is cold, with average daytime highs around 7°C (45°F) and nighttime lows near -1°C (30°F). Expect roughly 73mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — warm coat · sweaters and layers · scarf
February in Washington is chilly, with average daytime highs around 9°C (48°F) and nighttime lows near 0°C (32°F). Expect roughly 66mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — jacket or coat · long-sleeve layers
March in Washington is chilly, with average daytime highs around 14°C (56°F) and nighttime lows near 4°C (39°F). Expect roughly 89mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — jacket or coat · long-sleeve layers
April in Washington is pleasantly warm, with average daytime highs around 20°C (68°F) and nighttime lows near 9°C (48°F). Expect roughly 82mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
🎒 What to pack — light layers · comfortable walking shoes
May in Washington is pleasantly warm, with average daytime highs around 25°C (76°F) and nighttime lows near 14°C (58°F). Expect roughly 100mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
🎒 What to pack — light layers · comfortable walking shoes
June in Washington is warm, with average daytime highs around 30°C (85°F) and nighttime lows near 20°C (67°F). Expect roughly 107mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
July in Washington is hot, with average daytime highs around 32°C (90°F) and nighttime lows near 22°C (72°F). Expect roughly 110mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle
August in Washington is hot, with average daytime highs around 31°C (88°F) and nighttime lows near 22°C (71°F). Expect roughly 83mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle
September in Washington is warm, with average daytime highs around 27°C (81°F) and nighttime lows near 18°C (64°F). Expect roughly 100mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
October in Washington is pleasantly warm, with average daytime highs around 21°C (69°F) and nighttime lows near 11°C (52°F). Expect roughly 93mm of precipitation spread over about 6 rainy days, with a moderate amount of rain.
🎒 What to pack — light layers · comfortable walking shoes
November in Washington is mild, with average daytime highs around 15°C (58°F) and nighttime lows near 5°C (42°F). Expect roughly 74mm of precipitation spread over about 6 rainy days, with a moderate amount of rain.
🎒 What to pack — light jacket · layers for cool evenings
December in Washington is chilly, with average daytime highs around 9°C (49°F) and nighttime lows near 1°C (35°F). Expect roughly 87mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
🎒 What to pack — jacket or coat · long-sleeve layers